"You cannot say it (anti-social behaviour) can be absolutely eliminated that would be false.
"But what you've actually got to actively do, professionally, is reduce that (level of anti-social behaviour) and this is the path to reducing the likelihood of that awful thing happening again."
More top news
Fine start to the week for most but turning wet and windy from Wednesday.
Thousands of people have lined the banks of the Mersey to see Cunard's three flagship ocean liners sail down the river.
Claims that surgeons used an old saw found in a cupboard to amputate a patient's leg are being investigated.